308 THE AMERICAN NATURALIST (Vou. XXXVI. 
completely: fill the spaces, and do not ‘seem in any’ case to 
occupy the cavities’ of the parapodia. “Spermatozoa were hot 
observed in any of the buds, indicating that even the oldest 
are not fully ripe. 
The. parapodia ‘are fans: equipped viti dorsal: and ventral 
cirri, setze, a pair of aciculze, — the latter projecting deeply into 
the sperm masses (Fig. ro, ac.); — and the usual musculature. 
Occupying a large portion of the cavity of each parapodium 
are pouch-shaped glandular: structures of unknown function. 
Each is composed of a few very large vesicular cells, and lias a 
good-sized lumen which appears to open near the base of the 
parapodium, on the ventral side (Figs. JO, rij 35; pi). “NG 
actual opening, however, has 
SP dm been found, and. the mouth 
inte seems entirely blocked by col- 
umnar epidermal cells (Fig. 
13). These glands occur in 
the segments of the attenuated 
caudal region, where they have 
the same size and aspect as in 
the buds. In the parapodia 
—Á— E of the stock — at least those 
fis wall marie oed, UNE NNNM of immediately in front of the 
fibers and ganglionic cells. x 100 budding zone —they are also 
found. Without much doubt these structures are homologous 
with the parapodial glands (glandes pédieuses) known to be 
present in Zrypanosyllis celiaca and in species of other genera 
of Syllidae! Their function is the secretion of mucus. From 
their histological aspect, this is genie likewise the functión 
of the above-described glands.? 
‘There are two large and conspicuous ventral nerve cords, 
with paired ganglia in every somite (Figs. 11, 12, Lc. eg). 
Proportionately to the size of the bud, the nervous system is 
much larger in this species than in 7: ingens. As accurately 
as — be made out from the single series of mo" iN 

; See Malaquin, p isal M sur ja  Syllidiens, P. sr PL vir, Fig. "a ERR 
: Da is interesting to find that these ese glands are not "v relatively, but Tat 
lately, 1 larger in the egm nts and in the bud: tock. 

